BST to COT
-6hBST
BSTSOURCECOT
COTGreen rows indicate typical business hours (9 AM - 5 PM)
BST and COT on the World Map
The map below highlights the BST (British Summer Time) and COT (Colombia Time) timezone regions across the globe.
BST – British Summer Time
UTC+01:00British Summer Time (BST, UTC+01:00) is the daylight saving period in the United Kingdom, running from late March to late October.
- •BST runs from the last Sunday in March to the last Sunday in October.
- •BST is exactly one hour ahead of GMT, the UK's standard time.
- •During BST, London is 4 hours ahead of New York while the US is on Eastern Daylight Time.
- •The Isle of Man and the Channel Islands also observe BST.
COT – Colombia Time
UTC-05:00Colombia Time (COT) is the standard time for Colombia, 5 hours behind UTC.
- •Colombia does not observe daylight saving time.
- •COT is the same offset as EST (UTC-05:00).
- •Bogotá sits at 2,640m elevation, making it one of the highest capital cities.
Everything You Need to Know About BST and COT Time
BST runs on British Summer Time (BST) at UTC+01:00. COT runs on Colombia Time (COT) at UTC-05:00. That puts BST 6 hours behind COT — a difference of -6h at the current offsets.
In practice, when it is 9:00 AM in BST it is 3:00 AM in COT. Midnight in BST is 6:00 PM in COT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
BST to COT time conversion table
| BST (BST) | COT (COT) | Day |
|---|---|---|
| 12:00 AM | 6:00 PM | previous day |
| 6:00 AM | 12:00 AM | same day |
| 7:00 AM | 1:00 AM | same day |
| 8:00 AM | 2:00 AM | same day |
| 9:00 AM | 3:00 AM | same day |
| 12:00 PM | 6:00 AM | same day |
| 3:00 PM | 9:00 AM | same day |
| 5:00 PM | 11:00 AM | same day |
| 6:00 PM | 12:00 PM | same day |
| 9:00 PM | 3:00 PM | same day |
Why people convert BST to COT time
- Scheduling a call from BST to COT: a 10:00 AM start in BST lands at 4:00 AM in COT, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both BST and COT are inside the 9-to-5 working day between 3:00 PM and 5:00 PM BST time (9:00 AM–11:00 AM COT). That is roughly 2 hours of usable overlap.
- Watching a live event or market open: BST viewers need 3:00 AM in COT to catch a 9:00 AM start there, and 6:00 AM if the event is anchored to BST.
- Always state the zone abbreviation, not just the hour. "3:00 PM BST" is unambiguous; "3 PM" across a -6h gap is not.
- Block 3:00 PM–5:00 PM BST as the recurring meeting window if you work primarily from BST and need COT colleagues present.
About BST (British Summer Time)
British Summer Time (BST) is the daylight saving period in the United Kingdom, when clocks move one hour forward from Greenwich Mean Time (GMT, UTC+00:00) to UTC+01:00. It runs from the last Sunday in March to the last Sunday in October. England, Scotland, Wales and Northern Ireland all follow it, along with the Isle of Man and the Channel Islands of Jersey and Guernsey. During BST, London is one hour ahead of UTC, four hours ahead of New York on Eastern Daylight Time, and five hours ahead of New York once the United States returns to Eastern Standard Time in November. BST is also used to abbreviate Bangladesh Standard Time (UTC+06:00), which is listed separately on this site.
About COT (Colombia Time)
Colombia Time (COT) is used throughout Colombia. Colombia does not observe daylight saving time. COT shares the same offset as EST (UTC-05:00). Bogotá, the capital, is one of the largest cities in South America.
Best time to call between BST and COT
Both BST and COT sit inside the 9 AM – 5 PM working day between 3:00 PM–5:00 PM BST, which is 9:00 AM–11:00 AM COT. That gives roughly 2 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
BST and COT overlap for about 2 hours during the working day — enough for meetings if you avoid the edges of the window.
BST is 6 hours behind COT (BST UTC+01:00 → COT UTC-05:00). The shared working window is 3:00 PM–5:00 PM BST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
BST
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 2026
COT
Does not observe DST
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between BST and COT?
BST (BST, UTC+01:00) is 6 hours behind COT (COT, UTC-05:00). The gap is currently -6h.
How do I convert BST time to COT time?
Add -6h to BST local time. For example, 9:00 AM in BST is 3:00 AM in COT.
What time is it in COT right now?
COT uses COT at UTC-05:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -6h offset from BST.
What is the best time to call COT from BST?
Call between 3:00 PM and 5:00 PM BST — that maps to 9:00 AM–11:00 AM COT and keeps both parties inside the working day.
Which is behind, BST or COT?
BST is 6 hours behind COT. When it is 12:00 PM in BST it is 6:00 AM in COT.
Does daylight saving time affect the BST–COT difference?
Neither zone observes daylight saving time, so the -6h offset between BST and COT is fixed all year.
Which other cities share BST's time zone?
BST also covers London, Birmingham, Manchester, Glasgow, Edinburgh, Cardiff, Belfast, Liverpool and 2 more.
Which countries use BST, BST's zone?
BST is used in United Kingdom.
Is there a day difference between BST and COT?
Not normally. The -6h gap only pushes the date over the previous day.
What is the time difference between BST and COT?
COT is -6h from BST.
What timezone is BST in?
BST operates on its local timezone.
What timezone is COT in?
COT operates on its local timezone.
Which countries use BST (British Summer Time)?
BST is used in United Kingdom.
Does BST observe daylight saving time?
Yes, BST switches to BST during summer months.
What are some interesting facts about BST?
BST runs from the last Sunday in March to the last Sunday in October. BST is exactly one hour ahead of GMT, the UK's standard time.
Which cities are in the COT timezone?
Major cities in the COT timezone include Bogotá, Medellín, Cali, Barranquilla, Cartagena.
What is the UTC offset for COT?
Colombia Time (COT) is at UTC-05:00.
What should I know about the COT timezone?
Colombia does not observe daylight saving time. COT is the same offset as EST (UTC-05:00).
When is it midnight in BST, what time is it in COT?
When it is 12:00 AM (midnight) in BST (BST), it is -6h later in COT (COT).
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